* {
    padding: 0px;
    margin: 0px;
    list-style: none;
    font-family: 宋体;
}

.u-img {
    width: 730px;
    height: 454px;
    margin: 50px auto;
    /*border: 5px solid #000;*/
    position: relative;
    overflow: hidden;
}

.u-img:hover .btn {
    display: block;
}

.u-img .img {
    width: 5000px;
    position: absolute;
    left: 0px;
    top: 0px;

}

.u-img .img li {
    float: left;
    cursor: pointer;

}

.u-img .point {
    position: absolute;
    bottom: 15px;
    left: 50%;
    font-size: 0px;
    background-color: rgba(0, 0, 0, 0.4);
    padding: 3px;
    border-radius: 10px;
}

.u-img .point li {
    width: 10px;
    height: 10px;
    background-color: darkgrey;
    border-radius: 50%;
    display: inline-block;
    margin: 0px 2px;
}

.u-img .point li.sel {
    background-color: orange;
}

.u-img .btn {
    width: 25px;
    height: 50px;
    background-color: rgba(105, 105, 105, 0.5);
    position: absolute;
    top: 50%;
    margin-top: -25px;
    text-align: center;
    line-height: 50px;
    font-size: 35px;
    color: #fff;
    cursor: pointer;
    display: none;
}

.left {
    left: 0px;
}

.right {
    right: 0px;
}

